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The nominees for the special election to fill the seat of former Rep. Pat Tiberi are now set. (Bill Clark/CQ Roll Call file photo)

Ohio Republican state Sen. Troy Balderson and Democrat Danny O’Connor, the Franklin County recorder, will face off in the August special election to fill former GOP Rep. Pat Tiberi’s seat in the 12th District.

Balderson won the GOP primary with 29 percent of the vote, finishing narrowly ahead of Liberty Township Trustee Melanie Leneghan, who had 28 percent. The fight between them had become a traditional Republican proxy war.